causes the FCI diagonalization to be bypassed, with input information
and transformed integrals being written to a formatted file FCIDUMP.
The format is as described in Comp. Phys. Commun. 54 (1989) 75, and in
an external program should be accessed using the
FCIdump class or module available from
https://bitbucket.org/pjknowles/fcidump.